CN217562120U - Sieve plate falling alarm device of medium removing sieve - Google Patents
Sieve plate falling alarm device of medium removing sieve Download PDFInfo
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- CN217562120U CN217562120U CN202221624902.9U CN202221624902U CN217562120U CN 217562120 U CN217562120 U CN 217562120U CN 202221624902 U CN202221624902 U CN 202221624902U CN 217562120 U CN217562120 U CN 217562120U
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- resistance detection
- sieve plate
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Abstract
The utility model discloses a take off medium sieve plate alarm device that drops, the device includes: the sieve plate rail seats are arranged in the sieve frame, the sieve plates in the same sieve plate group are connected in series and have the same seam drying specification, and the side surface of each sieve plate is provided with an electrode; the electrode lead-out wire of the first sieve plate and the last sieve plate in the sieve plate group is connected with the input of the resistance detection module, the resistance detection module is connected with a power supply, the output of the resistance detection module is connected with a coil loop of the intermediate relay, and a normally closed point of the intermediate relay is connected with the audible and visual alarm in series. The utility model discloses an at sieve side-mounting electrode, electrode lead-out wire access resistance detection return circuit, when the sieve is not hard up to drop, through detecting the electrode resistance change between the sieve, can in time discover the sieve fault of coming off, in time handle in the accident bud state, realize taking off the high-efficient operation of medium sieve safety.
Description
Technical Field
The utility model relates to a coal dressing electric machine technical field, concretely relates to take off rank media sieve plate alarm device that drops.
Background
In normal production of a main washing system of a coal preparation plant, large clean coal or gangue should enter a screen surface of a medium removal screen, but when a screen surface screen plate is loosened and falls off, the gangue or the large clean coal falls into a screen hopper and then enters a medium combining barrel, so that the medium combining barrel is blocked, the medium combining barrel cannot normally work after the medium combining barrel overflows the barrel and a medium combining pump does not contain qualified medium solution, major electromechanical accidents influencing interruption of main washing production are caused, and the influence time is possibly more than 10 hours. On the other hand, gangue and large clean coal entering the medium combining barrel need to be cleaned manually, so that the labor intensity of workers is increased, and the safety production is seriously threatened.
In the related art, the chinese patent application with application publication No. CN108554801A discloses a device for monitoring the falling of a sieve plate of a medium removing sieve, which comprises a foreign matter detection box, an undersize pipeline, a detection module and a control unit; the foreign matter detection box is connected with the undersize pipeline, the bottom of the foreign matter detection box is provided with a grate, and the top of the foreign matter detection box is provided with a detection box cover plate; the detection module is arranged on the foreign matter detection box and used for detecting the position of the detection box cover plate, when the foreign matter detection box accumulates materials to a certain height, the detection box cover plate is enabled to move, the control unit outputs an alarm signal, and the detection module is a photoelectric switch. However, when the monitoring device is used, the materials in the foreign matter detection box need to be accumulated to a certain amount, the detection box cover plate is moved, the detection unit can detect that the distance between the detection unit and the detection box cover plate is changed, and then an alarm signal is output, so that the falling fault of the sieve plate cannot be found in time.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that how to detect out fast timely takes off the trouble that the medium sieve plate drops.
The utility model discloses a following technical means realizes solving above-mentioned technical problem:
the utility model provides a take off and decide sieve plate alarm device that drops, the device includes: the screen plate rail seats are arranged in the screen frame, the screen plates in the same screen plate group are connected in series and have the same seam drying specification, and the side surface of each screen plate is provided with an electrode;
the electrode lead-out wire of the first sieve plate and the last sieve plate in the sieve plate group is connected with the input of the resistance detection module, the resistance detection module is connected with a power supply, the output of the resistance detection module is connected with a coil loop of the intermediate relay, and a normally closed point of the intermediate relay is connected with the audible and visual alarm in series.
The utility model discloses an at sieve side-mounting electrode, the sieve series connection between same sieve group, with the electrode lead-out wire access resistance detection circuit of first piece and last sieve in the sieve group, when the sieve is not hard up to drop, through detecting the electrode resistance change between the sieve, through detection circuitry detection discernment, reach after the condition of setting for in advance, the on-the-spot audible-visual alarm that sends, can in time discover the sieve fault that drops, in time handle in the bud state of accident, realize the safe high-efficient operation of sieve that takes off media.
Furthermore, another normally closed point of the intermediate relay is connected to a PLC module, and the PLC module is connected with an upper computer.
Furthermore, the power supply is connected to the resistance detection module after passing through the isolated power adapter.
Furthermore, a potentiometer is arranged between the resistance detection module and the power supply.
Further, the resistance detection module adopts a resistance detection multifunctional meter.
The utility model has the advantages that:
(1) The utility model discloses an at sieve side-mounting electrode, the sieve series connection between same sieve group, the electrode lead-out wire with first piece and last sieve in the sieve group inserts resistance detection circuit, when the sieve is not hard up to drop, through detecting the electrode resistance change between the sieve, through detection circuitry detection discernment, reach the condition back of setting for in advance, the on-the-spot audible and visual alarm that sends, accessible time discover the sieve breakdown, in time handle in accident germination state, realize the safe high-efficient operation of sieve of scurrying.
(2) By adding the potentiometer in the resistance detection loop, the resistance between the sieve plates is very small under the condition that the sieve plates normally fall off, the current of the detection loop is stabilized to 15MA by adjusting the resistance value of the potentiometer, and no output exists when the input current of the multifunctional meter is lower than 10MA, so that false alarm is avoided.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is an electrical installation schematic diagram of a screen plate drop alarm device of a medium removing screen in an embodiment of the present invention;
FIG. 2 is a schematic diagram of the operation of a screen plate falling alarm device of the medium removing screen in the embodiment of the present invention;
FIG. 3 is a top view of a screen plate mounting electrode in an embodiment of the present invention;
figure 4 is a side view of a screen plate mounting electrode in an embodiment of the invention;
fig. 5 is a schematic view of a sieve plate structure in an embodiment of the present invention;
fig. 6 is a schematic structural view of a medium removing screen plate device in a first embodiment of the present invention;
fig. 7 is a schematic diagram of the first embodiment of the present invention.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, the utility model discloses a first embodiment provides a take off medium sieve plate alarm device that drops, the device includes: the screen plate rail seats are arranged in the screen frame, the screen plates in the same screen plate group are connected in series and have the same seam drying specification, and the side surface of each screen plate 10 is provided with an electrode 20;
the electrode outgoing line of the first sieve plate 10 and the electrode outgoing line of the last sieve plate 10 in the sieve plate set are connected with the input of the resistance detection module 30, the resistance detection module 30 is connected with the power supply 40, the output of the resistance detection module 30 is connected with the coil loop of the intermediate relay 50, and a normally closed point of the intermediate relay 50 is connected with the audible and visual alarm 60 in series.
As shown in fig. 2, the utility model discloses an at the side-mounting electrode of sieve, the sieve series connection between the same sieve group, insert the resistance detection return circuit with the electrode lead-out wire of first and last sieve in the sieve group, when the sieve becomes flexible and drops, through detecting electrode resistance change between the sieve, specifically for normally not having under the condition that the sieve drops, the resistance is very little between the sieve, and detection return circuit has the output, and the circuit is led to, and the intermediate relay is electrified, and the normal close point breaks off, and the acousto-optic warning circuit is not logical; when the sieve condition of dropping appeared, the resistance increase between the sieve, the detection circuitry medium current reduces, and detection loop does not have the output, and auxiliary relay loses the electricity, and the normal close point is closed, and audible-visual annunciator output sends audible-visual annunciator on the scene, can in time discover the sieve fault that drops, in time handles in the accident bud state, realizes the safe high-efficient operation of demeshing sieve.
In one embodiment, the other normally closed point of the intermediate relay 50 is connected to a PLC module 70, and the PLC module 70 is connected to an upper computer.
It should be noted that, the stop signal is connected to the PLC module, the centralized control system responds to the program, the relevant equipment is immediately stopped, the PLC module dispatches the upper computer to send out a fault voice alarm, and the dispatcher schedules personnel for maintenance.
In one embodiment, the power supply is connected to the resistance detection module after passing through the isolated power adapter.
It should be noted that 220V ac power is taken from the site control box, 12V dc is outputted through an isolated power adapter (model: YAB-DYZ012, input: 150V-264V, output: 12VDC 2A), and working power is supplied to the series-connected sieve plate detection circuit.
In an embodiment, a potentiometer 80 is further disposed between the resistance detection module 30 and the power source 40.
It should be noted that, under the condition that no sieve plate falls normally, the resistance between sieve plates is small, the current of the detection loop is stabilized to 15MA by adjusting the resistance of the potentiometer RX, and at this time, no output is provided when the input current of the resistance detection module is set to be lower than 10MA, and output is provided when the input current is larger than 10 MA.
In the embodiment, by arranging the adjustable potentiometer, when the screen plates are caused by factors such as installation accuracy and method difference, the resistance between each group of screen plates is different, and when the voltage applied between each group of screen plates is constant, the input current of the detection loop can be stabilized to the required value of 15MA by adjusting the potentiometer.
In one embodiment, the resistance detection module 30 employs a resistance detection multifunctional meter.
It should be noted that the type of the resistance detection multifunctional meter adopted in this embodiment is as follows: LU-904MCj1j1I21; the adopted audible and visual alarm is of the following types: KXB127.
In one embodiment, as shown in fig. 5, the sieve plate is a stainless steel slotted sieve plate with dual shunting blocks, the clamping pieces 90 are arranged at two ends of the sieve plate, the clamping pieces 90 are mounted on a sieve plate rail seat, the sieve plate rail seat is arranged in a polyurethane frame of 610 × 610, and an electrode is arranged on a side surface of the sieve plate; the sieve plates are tightly combined, the medium removing effect is good, the sieve plates are wear-resistant, and the service life is long.
In one embodiment, as shown in fig. 3, 4, 5 and 6, an electrode 20 is arranged on the side surface of each screen plate 10, the electrode is made of brass bolts with the diameter of 8mm, and the screen plates provided with the electrodes are connected in series. In practical application, each screen surface has 60 screen plates in total, the medium removing screen plates are arranged on the screen plate rail seats of the screen frame and are arranged in parallel in 10 rows and 6 columns, and each 2 rows of 12 screen plates are a group and are sewn into the same specification, so that the advantages of grouping are as follows: the sieve plates of the same specification are connected with the alarm device in the same group configuration, the dropping fault of the sieve plates can be quickly found and processed, the sieve plates are convenient to replace and convenient to daily classified maintenance, and meanwhile, the requirement of a coal washing production process can be met.
Every screen surface is totally 60 sieve boards, divides into 5 independent detection module altogether, can realize taking off all-round autoalarm when the medium sieve board drops, and the discovery sieve board drops in time, avoids the accident to enlarge, eliminates the accident potential at the bud state.
As shown in figure 7, when the measuring signal fluctuates near the alarm point, the multifunctional instrument continuously enters and exits the alarm state, so that the output contact can frequently bounce to generate frequent alarm, and the external interlocking device breaks down, and the 904MC series intelligent digital display has a return difference alarm setting function, so that the situation can be avoided.
In one embodiment, the detection loop may send the output: the instrument can transmit and output the measured value as 0-10mA or 4-20mA standard current, the output current form is determined by 'oP' parameter, and the transmitting range of the measured value is determined by 'LoL' and 'HiL' parameters. The two measurement value transmission output modes are functions of the instrument, and both the two measurement value transmission output modes are linear and standard, so that the subsequent equipment can receive and identify the measurement value conveniently.
This embodiment adopts simple series circuit principle, utilizes the detection sample, output and the external circuit of the condition design that the scene has, through the detection to state between the sieve, realizes reporting to the police in advance that the sieve dropped of taking off the medium sieve, reduces and takes off the medium sieve accident influence time. The original sieve plate can be used only by manufacturing and installing electrodes, the material cost is low, the transformation cost is low, and the comprehensive popularization and implementation are easy.
The problem of early warning of the screen plate removed by medium removal and screening in the production process of a coal preparation plant is solved, the alarm is given immediately and the machine is stopped when the screen plate is loosened, the normal coal washing production is ensured, the accident rate is reduced, the labor intensity of workers is reduced, the safety threat is reduced, and the obtained economic benefit is about 20 ten thousand yuan per year!
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (5)
1. A screen plate drop alarm device for a medium removing screen, the device comprising: the screen plate rail seats are arranged in the screen frame, the screen plates in the same screen plate group are connected in series, the seam drying specifications are the same, and an electrode is arranged on the side surface of each screen plate;
the electrode lead-out wire of the first sieve plate and the last sieve plate in the sieve plate set is connected with the input of the resistance detection module, the resistance detection module is connected with a power supply, the output of the resistance detection module is connected with a coil loop of the intermediate relay, and a normally closed point of the intermediate relay is connected with the audible and visual alarm in series.
2. The screen plate falling alarm device of claim 1, wherein another normally closed point of the intermediate relay is connected to a PLC module, and the PLC module is connected to an upper computer.
3. The de-interlacing screen deck drop alarm device as recited in claim 1 wherein said power source is coupled to said resistance detection module through an isolated power adapter.
4. The screen plate drop alarm device of claim 1, wherein a potentiometer is further disposed between the resistance detection module and the power source.
5. The screen plate drop alarm device of claim 1, wherein the resistance detection module employs a resistance detection multifunctional meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221624902.9U CN217562120U (en) | 2022-06-24 | 2022-06-24 | Sieve plate falling alarm device of medium removing sieve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221624902.9U CN217562120U (en) | 2022-06-24 | 2022-06-24 | Sieve plate falling alarm device of medium removing sieve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217562120U true CN217562120U (en) | 2022-10-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221624902.9U Active CN217562120U (en) | 2022-06-24 | 2022-06-24 | Sieve plate falling alarm device of medium removing sieve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217562120U (en) |
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2022
- 2022-06-24 CN CN202221624902.9U patent/CN217562120U/en active Active
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